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June 9, 2015

About

A nine-point circle is a circle that exists for any given triangle. Nine Point Circle displays a triangle and it's nine-point circle. You can drag any of the triangle's three points and observe how it effects the nine-point circle.

For more information see Wikipedia's Nine-point circle article.

To Do:

• Proper cartesian coordinates with visible X and Y axis.
• Label the triangle's three points.
• Some way to distinguish stacked points. Maybe draw lower points bigger than upper points.
• Pan and Zoom.
• Better icon.

Download

• 2015-06-09: Windows - 80K Zip
• 2015-06-08: Mac - 33K Zip

Screenshot

Windows 7

Mac

Help

Controls:

• Left-mouse-down to drag the 3 triangle points.
• Left-mouse-down in the triangle to drag all 3 points.
• Right-mouse-down anywhere and drag horizontal to rotate around the circumcenter.